After procastrinating for months on building one myself, I'm resorting to buying. I am looking for a snuffer ring and sock to set up on my Mystere 6.0. I have a rather old chute that's >600sqft, currently launching from the bag on the trampoline.
Other than buying directly from Nacra or Hobie (or Mystere), are there any other places where you can buy these? Are there any do-it-yourself-ers who are selling these? What should I look at before spending my $$? Thanks!

Greater than 600 and you want to snuff it? I had a mid-pole on a 6.0 that we were snuffing a 400 or so Smyth spin. PIA! Maybe it was the snuffer head size since it always seemed a little small. I think it was a Prost. So from my experience you may want to make sure it is a big diameter head. I think both the heads entrance and exit need to be big. Also, you may want to think about how long your bag will need to be. What are you dimension that you are working with like luff length and foot length and how long your pole is.

Ok - so I need to learn the basics here...this is all new to me. Understood that a 600sqft spin has a larger volume and therefor heeds wider diameters on the ring. How does the length of the foot, the luff length and the pole / sock length all hang together? Are there some basic rules?

Forget the ring size... 600 sqft?!? holy beheyzeus.

The 425 worrell style I thought was humongous... but that one is just ....

titan-sized.

hmmm...

My original reply is below then I noticed you asked a direct question about a basic rule. Well maybe not a rule but a goal was to have the head, tack and clew all in the snuffer head. I was wondering if a mid-pole is right for you? Buy the time you make a bag long enough to hold that chute, you might have to locate the snuffer head near the end of the pole anyway. Also, I was concerned about pole length because of just trying to visualize how a 600 plus chute fits on a 20 boat. 15’ pole or bigger, set really low, mast head, back beam sheeting with the clew almost being back there.

The rest of my dribble:

Does your spin have snuffing patches currently? If not, then you could take it to a sail maker and have them installed. One of the things that our sail maker thought was important when locating the patches was having all three corners be in the head when the chute is snuffed. He located the top patch and the bottom patch by taking the longest length, which is usually the luff and dividing it by 3 for a starting measurement. Three was only important because we were trying to get away with only two patches. Next, we measured from the tack and the clew finding the intersecting points on the arc. Say that 10’ (30’/3). Thru this iterative process, I think we settled on around 12’ from each corner. You could fix the bag length then at the 12’ dimension. But knowing that we were trying to snuff a lot of material I think we added a foot or two so that bag was around 14’. After trying this I then added a stopper ball to the snuffer line that spaced out the patches by one foot. That did help get the spin snuffed.

A little detail about the end of the snuffer bag is to have it sewn closed and put a grommet near the end of it to have the snuffer line run through. The reasoning behind this if from first hand experience on two separate occasions: the first being on the beach prior to race and snuffing chute to get going me crew pulled it out of the end of the bag by about 6”. We didn’t notice, went out to race and couldn’t get it out of the bag, it was only an hour or so race. The second being during the c100, me crew and very good crew btw, pulled it out the back just a little bit. Enough so that it wouldn’t go up. He ended up in the water, pulling it out a little more then stuffing it back in. The real problem was that I had hand sewn it up almost completely closed with whipping twine. It didn’t hold so the hole became big enough to allow the patch to get thru. A secondary factor is the change in effort required once the first mass of material gets passed the head. The effort required goes way down. So the crew goes from standing up, using their legs and all their weight, to just having to pull like they are on an I20.:)

A little detail about the end of the snuffer bag is to have it sewn closed and put a grommet near the end of it to have the snuffer line run through. The reasoning behind this if from first hand experience on two separate occasions: the first being on the beach prior to race and snuffing chute to get going me crew pulled it out of the end of the bag by about 6”. We didn’t notice, went out to race and couldn’t get it out of the bag, it was only an hour or so race. The second being during the c100, me crew and very good crew btw, pulled it out the back just a little bit. Enough so that it wouldn’t go up. He ended up in the water, pulling it out a little more then stuffing it back in. The real problem was that I had hand sewn it up almost completely closed with whipping twine. It didn’t hold so the hole became big enough to allow the patch to get thru. A secondary factor is the change in effort required once the first mass of material gets passed the head. The effort required goes way down. So the crew goes from standing up, using their legs and all their weight, to just having to pull like they are on an I20.:)

Hopefully, others will share their experiences here also,